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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="interprocess.acknowledgements_notes"></a><a class="link" href="acknowledgements_notes.html" title="Acknowledgements, notes and links">Acknowledgements,
    notes and links</a>
</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows">Notes
      for Windows users</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_linux">Notes
      for Linux users</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_freebsd">Notes
      for FreeBSD users</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to">Thanks
      to...</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes">Release
      Notes</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links">Books
      and interesting links</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements">Future
      improvements...</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.notes_windows"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows" title="Notes for Windows users">Notes
      for Windows users</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows.notes_windows_com_init">COM
        Initialization</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows.notes_windows_shm_folder">Shared
        memory emulation folder</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows.boost_use_windows_h">BOOST_USE_WINDOWS_H
        support</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.notes_windows.notes_windows_com_init"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows.notes_windows_com_init" title="COM Initialization">COM
        Initialization</a>
</h4></div></div></div>
<p>
          <span class="bold"><strong>Boost.Interprocess</strong></span> uses the Windows COM
          library to implement some features and initializes it with concurrency
          model <code class="computeroutput"><span class="identifier">COINIT_APARTMENTTHREADED</span></code>.
          If the COM library was already initialized by the calling thread for another
          concurrency model, <span class="bold"><strong>Boost.Interprocess</strong></span>
          handles this gracefully and uses COM calls for the already initialized
          model. If for some reason, you want <span class="bold"><strong>Boost.Interprocess</strong></span>
          to initialize the COM library with another model, define the macro <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_WINDOWS_COINIT_MODEL</span></code>
          before including <span class="bold"><strong>Boost.Interprocess</strong></span> to
          one of these values:
        </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <code class="computeroutput"><span class="identifier">COINIT_APARTMENTTHREADED_BIPC</span></code>
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">COINIT_MULTITHREADED_BIPC</span></code>
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">COINIT_DISABLE_OLE1DDE_BIPC</span></code>
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">COINIT_SPEED_OVER_MEMORY_BIPC</span></code>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.notes_windows.notes_windows_shm_folder"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows.notes_windows_shm_folder" title="Shared memory emulation folder">Shared
        memory emulation folder</a>
</h4></div></div></div>
<p>
          Shared memory (<code class="computeroutput"><span class="identifier">shared_memory_object</span></code>)
          is implemented in Windows using memory mapped files, placed in a shared
          directory in the shared documents folder (<code class="computeroutput"><span class="identifier">SOFTWARE</span><span class="special">\</span><span class="identifier">Microsoft</span><span class="special">\</span><span class="identifier">Windows</span><span class="special">\</span><span class="identifier">CurrentVersion</span><span class="special">\</span><span class="identifier">Explorer</span><span class="special">\</span><span class="identifier">Shell</span> <span class="identifier">Folders</span><span class="special">\</span><span class="identifier">Common</span> <span class="identifier">AppData</span></code>).
          This directory name is the last bootup time obtained via Registry values
          of the Session Manager. This behaviour is the default since Boost 1.74.
        </p>
<p>
          Old <span class="bold"><strong>Boost.Interprocess</strong></span> versions (until
          Boost 1.48 ) used COM calls (via macro <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_BOOTSTAMP_IS_LASTBOOTUPTIME</span></code>)
          but that timestamp was unreliable in Virtual Machines and time adjustements.
          Next versions until (Boost 1.74) used EventLog startup event as timestamp,
          but several users discovered this event could be absent in the Event Log
          if the system was up for a long time. You can force this Event Log based
          timestamp defining BOOST_INTERPROCESS_BOOTSTAMP_IS_EVENTLOG_BASED.
        </p>
<p>
          In any error case (shared documents folder is not defined or bootup time
          could not be obtained), the library throws an error. You still can use
          <span class="bold"><strong>Boost.Interprocess</strong></span> defining your own directory
          as the shared directory. When your shared directory is a compile-time constant,
          define <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_SHARED_DIR_PATH</span></code>
          (and BOOST_INTERPROCESS_SHARED_DIR_WPATH in Windows systems) when using
          the library and that path will be used to place shared memory files. When
          you have to determine the shared directory at runtime, define <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_SHARED_DIR_FUNC</span></code> and
          implement the following functions
        </p>
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
    <span class="keyword">namespace</span> <span class="identifier">interprocess</span> <span class="special">{</span>
        <span class="keyword">namespace</span> <span class="identifier">ipcdetail</span> <span class="special">{</span>
            <span class="keyword">void</span> <span class="identifier">get_shared_dir</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&amp;</span><span class="identifier">shared_dir</span><span class="special">);</span>
            <span class="comment">//wstring overload is only needed for Windows systems</span>
            <span class="keyword">void</span> <span class="identifier">get_shared_dir</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstring</span> <span class="special">&amp;</span><span class="identifier">shared_dir</span><span class="special">);</span>
        <span class="special">}</span>
    <span class="special">}</span>
<span class="special">}</span>
</pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.notes_windows.boost_use_windows_h"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_windows.boost_use_windows_h" title="BOOST_USE_WINDOWS_H support">BOOST_USE_WINDOWS_H
        support</a>
</h4></div></div></div>
<p>
          If <code class="computeroutput"><span class="identifier">BOOST_USE_WINDOWS_H</span></code>
          is defined, &lt;windows.h&gt; and other windows SDK files are included,
          otherwise the library declares needed functions and structures to reduce
          the impact of including those heavy headers.
        </p>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.notes_linux"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_linux" title="Notes for Linux users">Notes
      for Linux users</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_linux.notes_linux_shm_folder">Shared
        memory emulation folder</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_linux.notes_linux_overcommit">Overcommit</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.notes_linux.notes_linux_shm_folder"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_linux.notes_linux_shm_folder" title="Shared memory emulation folder">Shared
        memory emulation folder</a>
</h4></div></div></div>
<p>
          On systems without POSIX shared memory support, shared memory objects are
          implemented as memory mapped files, using a directory placed in "/tmp"
          that can include (if <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME</span></code>
          is defined) the last bootup time (if the OS supports it). As in Windows,
          in any error case obtaining this directory the library throws an error
          . When your shared directory is a compile-time constant, define <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_SHARED_DIR_PATH</span></code> when
          using the library and that path will be used to place shared memory files.
          When you have to determine the shared directory at runtime, define <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_SHARED_DIR_FUNC</span></code> and
          implement the function
        </p>
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
    <span class="keyword">namespace</span> <span class="identifier">interprocess</span> <span class="special">{</span>
        <span class="keyword">namespace</span> <span class="identifier">ipcdetail</span> <span class="special">{</span>
            <span class="keyword">void</span> <span class="identifier">get_shared_dir</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&amp;</span><span class="identifier">shared_dir</span><span class="special">);</span>
        <span class="special">}</span>
    <span class="special">}</span>
<span class="special">}</span>
</pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.notes_linux.notes_linux_overcommit"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_linux.notes_linux_overcommit" title="Overcommit">Overcommit</a>
</h4></div></div></div>
<p>
          The committed address space is the total amount of virtual memory (swap
          or physical memory/RAM) that the kernel might have to supply if all applications
          decide to access all of the memory they've requested from the kernel. By
          default, Linux allows processes to commit more virtual memory than available
          in the system. If that memory is not accessed, no physical memory + swap
          is actually used.
        </p>
<p>
          The reason for this behaviour is that Linux tries to optimize memory usage
          on forked processes; fork() creates a full copy of the process space, but
          with overcommitted memory, in this new forked instance only pages which
          have been written to actually need to be allocated by the kernel. If applications
          access more memory than available, then the kernel must free memory in
          the hard way: the OOM (Out Of Memory)-killer picks some processes to kill
          in order to recover memory.
        </p>
<p>
          <span class="bold"><strong>Boost.Interprocess</strong></span> has no way to change
          this behaviour and users might suffer the OOM-killer when accessing shared
          memory. According to the <a href="http://www.kernel.org/doc/Documentation/vm/overcommit-accounting" target="_top">Kernel
          documentation</a>, the Linux kernel supports several overcommit modes.
          If you need non-kill guarantees in your application, you should change
          this overcommit behaviour.
        </p>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.notes_freebsd"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_freebsd" title="Notes for FreeBSD users">Notes
      for FreeBSD users</a>
</h3></div></div></div>
<div class="toc"><dl class="toc"><dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_freebsd.notes_freebsd_umtx_vnode_persistent">Process-shared
        synchronization primitives and <span class="emphasis"><em>kern.ipc.umtx_vnode_persistent</em></span></a></span></dt></dl></div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.notes_freebsd.notes_freebsd_umtx_vnode_persistent"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes_freebsd.notes_freebsd_umtx_vnode_persistent" title="Process-shared synchronization primitives and kern.ipc.umtx_vnode_persistent">Process-shared
        synchronization primitives and <span class="emphasis"><em>kern.ipc.umtx_vnode_persistent</em></span></a>
</h4></div></div></div>
<p>
          Starting from FreeBSD 11, declares the macro _POSIX_THREAD_PROCESS_SHARED.
          However, the default behavior is different from the one on Linux. If you
          want to use this feature, according to the man page of libthr(3), you should
          check sysctl's <span class="emphasis"><em>kern.ipc.umtx_vnode_persistent</em></span>:
        </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              <span class="emphasis"><em>kern.ipc.umtx_vnode_persistent</em></span>: By default, a
              shared lock backed by a mapped file in memory is automatically destroyed
              on the last unmap of the corresponding file's page, which is allowed
              by POSIX. Setting the sysctl to 1 makes such a shared lock object persist
              until the vnode is recycled by the Virtual File System. Note that in
              case file is not opened and not mapped, the kernel might recycle it
              at any moment, making this sysctl less useful than it sounds.
            </li></ul></div>
<p>
          If you want mapped files to remain useful after the last handle is closed,
          set this variable to 1.
        </p>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.thanks_to"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to" title="Thanks to...">Thanks
      to...</a>
</h3></div></div></div>
<p>
        Many people have contributed with ideas and revisions, so this is the place
        to thank them:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            Thanks to all people who have shown interest in the library and have
            downloaded and tested the snapshots.
          </li>
<li class="listitem">
            Thanks to <span class="bold"><strong>Francis Andre</strong></span> and <span class="bold"><strong>Anders Hybertz</strong></span> for their ideas and suggestions.
            Many of them are not implemented yet but I hope to include them when
            library gets some stability.
          </li>
<li class="listitem">
            Thanks to <span class="bold"><strong>Matt Doyle</strong></span>, <span class="bold"><strong>Steve
            LoBasso</strong></span>, <span class="bold"><strong>Glenn Schrader</strong></span>,
            <span class="bold"><strong>Hiang Swee Chiang</strong></span>, <span class="bold"><strong>Phil
            Endecott</strong></span>, <span class="bold"><strong>Rene Rivera</strong></span>, <span class="bold"><strong>Harold Pirtle</strong></span>, <span class="bold"><strong>Paul Ryan</strong></span>,
            <span class="bold"><strong>Shumin Wu</strong></span>, <span class="bold"><strong>Michal
            Wozniak</strong></span>, <span class="bold"><strong>Peter Johnson</strong></span>,
            <span class="bold"><strong>Alex Ott</strong></span>, <span class="bold"><strong>Shane
            Guillory</strong></span>, <span class="bold"><strong>Steven Wooding</strong></span>
            and <span class="bold"><strong>Kim Barrett</strong></span> for their bug fixes
            and library testing.
          </li>
<li class="listitem">
            Thanks to <span class="bold"><strong>Martin Adrian</strong></span> who suggested
            the use of Interprocess framework for user defined buffers.
          </li>
<li class="listitem">
            Thanks to <span class="bold"><strong>Synge Todo</strong></span> for his boostbook-doxygen
            patch to improve Interprocess documentation.
          </li>
<li class="listitem">
            Thanks to <span class="bold"><strong>Olaf Krzikalla</strong></span> for his Intrusive
            library. I have taken some ideas to improve red black tree implementation
            from his library.
          </li>
<li class="listitem">
            Thanks to <span class="bold"><strong>Daniel James</strong></span> for his unordered_map/set
            family and his help with allocators. His great unordered implementation
            has been a reference to design exception safe containers.
          </li>
<li class="listitem">
            Thanks to <span class="bold"><strong>Howard Hinnant</strong></span> for his amazing
            help, specially explaining allocator swapping, move semantics and for
            developing upgradable mutex and lock transfer features.
          </li>
<li class="listitem">
            Thanks to <span class="bold"><strong>Pavel Vozenilek</strong></span> for his continuous
            review process, suggestions, code and help. He is the major supporter
            of Interprocess library. The library has grown with his many and great
            advices.
          </li>
<li class="listitem">
            And finally, thank you to all Boosters. <span class="bold"><strong>Long live
            to C++!</strong></span>
          </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.release_notes"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes" title="Release Notes">Release
      Notes</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_78_00">Boost
        1.78 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_77_00">Boost
        1.77 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_76_00">Boost
        1.76 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_75_00">Boost
        1.75 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_74_00">Boost
        1.74 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_71_00">Boost
        1.71 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_70_00">Boost
        1.70 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_69_00">Boost
        1.69 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_68_00">Boost
        1.68 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_67_00">Boost
        1.67 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_66_00">Boost
        1.66 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_65_00">Boost
        1.65 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_64_00">Boost
        1.64 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_63_00">Boost
        1.63 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_62_00">Boost
        1.62 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_61_00">Boost
        1.61 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_60_00">Boost
        1.60 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_59_00">Boost
        1.59 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_58_00">Boost
        1.58 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_57_00">Boost
        1.57 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_56_00">Boost
        1.56 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_55_00">Boost
        1.55 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_54_00">Boost
        1.54 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_53_00">Boost
        1.53 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_52_00">Boost
        1.52 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_51_00">Boost
        1.51 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_50_00">Boost
        1.50 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_49_00">Boost
        1.49 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_48_00">Boost
        1.48 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_46_00">Boost
        1.46 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_45_00">Boost
        1.45 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00">Boost
        1.41 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00">Boost
        1.40 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00">Boost
        1.39 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00">Boost
        1.38 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00">Boost
        1.37 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00">Boost
        1.36 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00">Boost
        1.35 Release</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_78_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_78_00" title="Boost 1.78 Release">Boost
        1.78 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Mutexes and condition variables now additionally offer a standard C++-like
              interface to allow reusing code that is already working with standard
              thread utilities. E.g.: mutexes meet <code class="computeroutput"><span class="identifier">TimedLockable</span></code>
              requirements and condition variables implement <code class="computeroutput"><span class="identifier">wait_until</span><span class="special">/</span><span class="identifier">wait_for</span></code>
              operations.
            </li>
<li class="listitem">
              Timeout support for managed memory segments: there are situations with
              concurrent creation and opening situations, half-initialized tries,
              corruption, etc. where the implementation has to loop, retrying the
              operation or just waiting another process to complete the initialization.
              This can lead to deadlocks, so the implementation was refactored to
              include retry and timeout limits.
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    BOOST_INTERPROCESS_MANAGED_OPEN_OR_CREATE_INITIALIZE_MAX_TRIES
                    (20 by default) limits the amount of times the implementation
                    will try to perform the following steps:
                    <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: square; ">
<li class="listitem">
                          Try to create the resource (shared memory, mapped file,
                          ...) and receive an "already existing" error
                        </li>
<li class="listitem">
                          Then try to open the resource but obtaining an "non
                          existing resource" error.
                        </li>
</ul></div>
                  </li>
<li class="listitem">
                    BOOST_INTERPROCESS_MANAGED_OPEN_OR_CREATE_INITIALIZE_TIMEOUT_SEC
                    (300 by default) limits the amount of times the implementation
                    will wait another thread to initialize (truncate the file/shared
                    memory, initialize managed headers...) the resource while trying
                    to open it concurrently.
                    <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: square; "><li class="listitem">
                          BOOST_INTERPROCESS_MANAGED_OPEN_OR_CREATE_INITIALIZE_MAX_TRIES/BOOST_INTERPROCESS_MANAGED_OPEN_OR_CREATE_INITIALIZE_TIMEOUT_SEC
                          can be defined by the user before including Boost.Interprocess
                          headers to tune the default values.
                        </li></ul></div>
                  </li>
</ul></div>
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/65" target="_top">GitHub
                    #65 (<span class="emphasis"><em>"Robustness of the interprocess mutex"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/67" target="_top">GitHub
                    #67 (<span class="emphasis"><em>"Changed to use posix robust mutex"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/103" target="_top">GitHub
                    #103 (<span class="emphasis"><em>"Use interprocess headers without exception
                    handling"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/128" target="_top">GitHub
                    #128 (<span class="emphasis"><em>"Infinite loop in managed_open_or_create_impl.hpp"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/130" target="_top">GitHub
                    #130 (<span class="emphasis"><em>"infinite loop in managed_open_or_create_impl.hpp
                    if filesize is 0"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/142" target="_top">GitHub
                    #142 (<span class="emphasis"><em>"File lock documentation about advisory
                    locking is inaccurate on Windows"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/149" target="_top">GitHub
                    #149 (<span class="emphasis"><em>"interprocess_condition_any::timed_wait
                    update"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/145" target="_top">GitHub
                    #145 (<span class="emphasis"><em>"1.76 now requires unicode paths on windows"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/154" target="_top">GitHub
                    #154 (<span class="emphasis"><em>"shared_memory_object::truncate() fails
                    on AIX"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/155" target="_top">GitHub
                    #155 (<span class="emphasis"><em>"properly initilize enable_shared_from_this
                    if the type is const"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/157" target="_top">GitHub
                    #157 (<span class="emphasis"><em>"Set sticky bit on shared interprocess folder"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/158" target="_top">GitHub
                    #158 (<span class="emphasis"><em>"atomic.hpp: adapt headers to AIX assembler"</em></span>)</a>.
                  </li>
</ul></div>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_77_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_77_00" title="Boost 1.77 Release">Boost
        1.77 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Interprocess no longer depends on Boost.DateTime. Instead, all timed
              functions were templated to take a TimePoint. This time point can be
              <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">date_time</span><span class="special">::</span><span class="identifier">ptime</span></code>, <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">time_point</span></code>
              or <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">time_point</span></code>.
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/50" target="_top">GitHub
                    #50 (<span class="emphasis"><em>"64-byte alignment causes assertion in rbtree_best_fit"</em></span>)</a>.
                  </li></ul></div>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_76_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_76_00" title="Boost 1.76 Release">Boost
        1.76 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Added <code class="computeroutput"><span class="keyword">wchar_t</span></code> API support
              for named resources in operating systems that offer native wide character
              API (e.g. Windows). The following classes were updated with <code class="computeroutput"><span class="keyword">wchar_t</span></code> name support:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">file_mapping</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">managed_mapped_file</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">managed_shared_memory</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">managed_windows_shared_memory</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">shared_memory_object</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">windows_shared_memory_object</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">file_lock</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">named_condition</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">named_condition_any</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">named_mutex</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">named_recursive_mutex</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">named_semaphore</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">named_sharable_mutex</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">named_upgradable_mutex</span></code>
                  </li>
<li class="listitem">
                    <code class="computeroutput"><span class="identifier">message_queue</span></code>
                  </li>
</ul></div>
            </li>
<li class="listitem">
              Added <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_FORCE_NATIVE_EMULATION</span></code>
              macro option to disable the use of generic emulation code for process
              shared synchronization primitives instead of native POSIX or Winapi
              functions.
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/76" target="_top">GitHub
                    #76 (<span class="emphasis"><em>"Cygwin compilation errors"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/83" target="_top">GitHub
                    #83 (<span class="emphasis"><em>"Add BOOST_INTERPROCESS_FORCE_NATIVE_EMULATION
                    option"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/92" target="_top">GitHub
                    #92 (<span class="emphasis"><em>"bufferstream: Correct MSVC compilation warning"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/106" target="_top">GitHub
                    #106 (<span class="emphasis"><em>"Use fallocate on truncate_file"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/120" target="_top">GitHub
                    #120 (<span class="emphasis"><em>"segment_manager customization"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/122" target="_top">GitHub
                    #122 (<span class="emphasis"><em>"Mark constructors/assignment/swap noexcept
                    where possible"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/126" target="_top">GitHub
                    #126 (<span class="emphasis"><em>"_ReadWriteBarrier is deprecated warning
                    when compiling with clang-cl.exe"</em></span>)</a>.
                  </li>
</ul></div>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_75_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_75_00" title="Boost 1.75 Release">Boost
        1.75 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/127" target="_top">GitHub
                    #127 (<span class="emphasis"><em>"static assertion failure with boost interprocess
                    1.74 and basic_managed_shared_memory"</em></span>)</a>.
                  </li></ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_74_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_74_00" title="Boost 1.74 Release">Boost
        1.74 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: Option <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_BOOTSTAMP_IS_SESSION_MANAGER_BASED</span></code>
              is now the default value. You can obtain the pre-Boost 1.73 behaviour
              defining <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_BOOTSTAMP_IS_EVENTLOG_BASED</span></code>.
              The old and broken pre-Boost 1.54 behaviour (<code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_BOOTSTAMP_IS_LASTBOOTUPTIME</span></code>)
              is no longer available.
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/89" target="_top">GitHub
                    #89 (<span class="emphasis"><em>"priv_size_from_mapping_size() calculates
                    wrong value"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/99" target="_top">GitHub
                    #99 (<span class="emphasis"><em>"Error in win32_api.hpp"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/105" target="_top">GitHub
                    #105 (<span class="emphasis"><em>"Build failure with clang on Windows"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/119" target="_top">GitHub
                    #119 (<span class="emphasis"><em>"Fix mingw compile error"</em></span>)</a>.
                  </li>
</ul></div>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_71_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_71_00" title="Boost 1.71 Release">Boost
        1.71 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/85" target="_top">GitHub
                    #85 (<span class="emphasis"><em>"warning: Implicit conversion loses integer
                    precision"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/86" target="_top">GitHub
                    #86 (<span class="emphasis"><em>"warning: Possible misuse of comma operator"</em></span>)</a>.
                  </li>
</ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_70_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_70_00" title="Boost 1.70 Release">Boost
        1.70 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/51" target="_top">GitHub
                    Pull #51 (<span class="emphasis"><em>"United handling of wait_for_single_object"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/78" target="_top">GitHub
                    Pull #78 (<span class="emphasis"><em>"Fix -Wextra-semi clang warnings"</em></span>)</a>.
                  </li>
</ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_69_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_69_00" title="Boost 1.69 Release">Boost
        1.69 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Deprecated GCC &lt; 4.3 and MSVC &lt; 9.0 (Visual 2008) compilers.
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/59" target="_top">GitHub
                    Issue #59 (<span class="emphasis"><em>"warning: ISO C++ prohibits anonymous
                    structs <span class="strikethrough">Wpedantic</span>"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/60" target="_top">GitHub
                    Issue #60 (<span class="emphasis"><em>"warning: cast between incompatible
                    function types from boost::interprocess::winapi::farproc_t..."</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/61" target="_top">GitHub
                    Issue #61 (<span class="emphasis"><em>"warning: struct winapi::*_BIPC has
                    virtual functions and accessible non-virtual destructor"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/64" target="_top">GitHub
                    Issue #64 (<span class="emphasis"><em>"UBSan: runtime error: load of value
                    4294967295, (...) for type 'boost::interprocess::mode_t'"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/68" target="_top">GitHub
                    Pull #68 (<span class="emphasis"><em>"Prepare for C++20 and remove "throw()"
                    usage"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/70" target="_top">GitHub
                    Pull #70 (<span class="emphasis"><em>"Fix deadlock in named_condition::notify_one"</em></span>)</a>.
                  </li>
</ul></div>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_68_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_68_00" title="Boost 1.68 Release">Boost
        1.68 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/53" target="_top">GitHub
                    Issue #53 (<span class="emphasis"><em>"Crash waiting on condition variable
                    from multiple processes in do_wait()"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/issues/54" target="_top">GitHub
                    Issue #54 (<span class="emphasis"><em>"fill_system_message() ignores an error
                    returned by winapi::format_message()"</em></span>)</a>.
                  </li>
</ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_67_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_67_00" title="Boost 1.67 Release">Boost
        1.67 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/45" target="_top">GitHub
                    Pull #45 (<span class="emphasis"><em>"Make intrusive_ptr move constructible/assignable"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/48" target="_top">GitHub
                    Pull #48 (<span class="emphasis"><em>"Win32: Fix read of reg_expand_sz type"</em></span>)</a>.
                  </li>
</ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_66_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_66_00" title="Boost 1.66 Release">Boost
        1.66 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/41" target="_top">GitHub
                    Pull #41 (<span class="emphasis"><em>"Data race in boost::interprocess::rbtree_best_fit"</em></span>)</a>.
                  </li></ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_65_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_65_00" title="Boost 1.65 Release">Boost
        1.65 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/37" target="_top">GitHub
                    Pull #37 (<span class="emphasis"><em>"Conditionally replace deprecated/removed
                    std::auto_ptr..."</em></span>)</a>.
                  </li></ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_64_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_64_00" title="Boost 1.64 Release">Boost
        1.64 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/12617" target="_top">Trac
                    #12617 (<span class="emphasis"><em>"clock_gettime not available on OS X 10.11"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/12744" target="_top">Trac
                    #12744 (<span class="emphasis"><em>"winapi::set_timer_resolution inadvertently
                    changes timer resolution (Windows)"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/32" target="_top">GitHub
                    Pull #32 (<span class="emphasis"><em>"Conform to std::pointer_traits requirements"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/33" target="_top">GitHub
                    Pull #33 (<span class="emphasis"><em>"explicit cast to derived class"
                    and "64/32 bit processes sharing"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/34" target="_top">GitHub
                    Pull #34 (<span class="emphasis"><em>"Update example to use multi_index::member
                    instead of BOOST_MULTI_INDEX_MEMBER"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/35" target="_top">GitHub
                    Pull #35 (<span class="emphasis"><em>"Fixed options for cross-compilation"</em></span>)</a>.
                  </li>
</ul></div>
            </li>
<li class="listitem">
              New experimental option <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_BOOTSTAMP_IS_SESSION_MANAGER_BASED</span></code>
              from Windows systems. This option derives the unique bootstamp used
              to name the folder where shared memory is placed from registry values
              associated with the session manager. This option only works on Vista
              and later systems and might be more stable than the default version.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_63_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_63_00" title="Boost 1.63 Release">Boost
        1.63 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/12499" target="_top">Trac
                    #12499 (<span class="emphasis"><em>"Memory allocation fails"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/30" target="_top">GitHub
                    Pull #30 (<span class="emphasis"><em>"Provide extension point so library
                    user can provide default temp folder"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/31" target="_top">GitHub
                    Pull #31 (<span class="emphasis"><em>"Add xsi_key(key_t) constructor"</em></span>)</a>.
                  </li>
</ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_62_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_62_00" title="Boost 1.62 Release">Boost
        1.62 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/27" target="_top">GitHub
                    Pull #27 (<span class="emphasis"><em>"Fix undefined behavior"</em></span>)</a>.
                  </li></ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_61_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_61_00" title="Boost 1.61 Release">Boost
        1.61 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/23" target="_top">GitHub
                    Pull #23 (<span class="emphasis"><em>"Fixed case sensitive for linux mingw"</em></span>)</a>.
                  </li></ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_60_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_60_00" title="Boost 1.60 Release">Boost
        1.60 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Improved <code class="computeroutput"><a class="link" href="../boost/interprocess/offset_ptr.html" title="Class template offset_ptr">offset_ptr</a></code>
              performance and removed any undefined behaviour. No special cases needed
              for different compilers.
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/11699" target="_top">Trac
                    #11699 (<span class="emphasis"><em>"Forward declarations of std templates
                    causes stack corruption under Visual Studio 2015"</em></span>)</a>.
                  </li></ul></div>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_59_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_59_00" title="Boost 1.59 Release">Boost
        1.59 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/5139" target="_top">Trac
                    #5139 (<span class="emphasis"><em>"Initial Stream Position in Boost.Interprocess.Vectorstream"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/19" target="_top">GitHub
                    Pull #19 (<span class="emphasis"><em>"Fix exception visibility"</em></span>)</a>.
                    Thanks to Romain-Geissler.
                  </li>
</ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_58_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_58_00" title="Boost 1.58 Release">Boost
        1.58 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Reduced some compile-time dependencies. Updated to Boost.Container
              changes.
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/13" target="_top">GitHub
                    Pull #13 (<span class="emphasis"><em>"haiku: we don't have XSI shared memory,
                    so don't try to use it"</em></span>)</a>. Thanks to Jessica
                    Hamilton.
                  </li></ul></div>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_57_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_57_00" title="Boost 1.57 Release">Boost
        1.57 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Removed <code class="computeroutput"><span class="identifier">unique_ptr</span></code>,
              now forwards boost::interprocess::unique_ptr to the general purpose
              <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">movelib</span><span class="special">::</span><span class="identifier">unique_ptr</span></code> class from <span class="bold"><strong>Boost.Move</strong></span>.
              This implementation is closer to the standard <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">unique_ptr</span></code>
              implementation and it's better maintained.
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/10262" target="_top">Trac
                    #10262 (<span class="emphasis"><em>"AIX 6.1 bug with variable definition
                    hz"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/10229" target="_top">Trac
                    #10229 (<span class="emphasis"><em>"Compiling errors in interprocess\detail\os_file_functions.hpp"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/10506" target="_top">Trac
                    #10506 (<span class="emphasis"><em>"Infinite loop in create_or_open_file"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/11" target="_top">GitHub
                    Pull #11 (<span class="emphasis"><em>"Compile fix for BOOST_USE_WINDOWS_H"</em></span>)</a>.
                  </li>
</ul></div>
            </li>
<li class="listitem">
              Reorganized Doxygen marks to obtain a better header reference.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_56_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_56_00" title="Boost 1.56 Release">Boost
        1.56 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9221" target="_top">Trac
                    #9221 (<span class="emphasis"><em>"message_queue deadlock on linux"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9226" target="_top">Trac
                    #9226 (<span class="emphasis"><em>"On some computers, Common Appdata is empty
                    in registry, so boost interprocess cannot work"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9262" target="_top">Trac
                    #9262 (<span class="emphasis"><em>"windows_intermodule_singleton breaks when
                    calling a Debug dll from a Release executable"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9284" target="_top">Trac
                    #9284 (<span class="emphasis"><em>"WaitForSingleObject(mutex) must handle
                    WAIT_ABANDONED"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9285" target="_top">Trac
                    #9285 (<span class="emphasis"><em>"CreateMutex returns NULL if fails"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9288" target="_top">Trac
                    #9288 (<span class="emphasis"><em>"timed_wait does not check if it has expired"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9408" target="_top">Trac
                    #9408 (<span class="emphasis"><em>"Android does not support XSI_SHARED_MEMORY_OBJECTS"</em></span></a>).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9729" target="_top">Trac
                    #9729 (<span class="emphasis"><em>"crash on managed_external_buffer object
                    construction"</em></span></a>).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9767" target="_top">Trac
                    #9767 (<span class="emphasis"><em>"bootstamp generation causes error in case
                    of corrupt Windows Event Log"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9835" target="_top">Trac
                    #9835 (<span class="emphasis"><em>"Boost Interprocess fails to compile with
                    Android NDK GCC 4.8, -Werror=unused-variable"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9911" target="_top">Trac
                    #9911 (<span class="emphasis"><em>"get_tmp_base_dir(...) failure"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9946" target="_top">Trac
                    #9946 (<span class="emphasis"><em>"ret_ptr uninitialized in init_atomic_func,
                    fini_atomic_func"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/10011" target="_top">Trac
                    #10011 (<span class="emphasis"><em>"segment_manager::find( unique_instance_t*
                    ) fails to compile"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/10021" target="_top">Trac
                    #10021 (<span class="emphasis"><em>"Interprocess and BOOST_USE_WINDOWS_H"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/10230" target="_top">Trac
                    #10230 (<span class="emphasis"><em>"No Sleep in interprocess::winapi"</em></span>)</a>.
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/2" target="_top">GitHub
                    Pull #2</a> (<span class="emphasis"><em>"Provide support for the Cray
                    C++ compiler. The Cray compiler defines __GNUC__"</em></span>]).
                  </li>
<li class="listitem">
                    <a href="https://github.com/boostorg/interprocess/pull/3" target="_top">GitHub
                    Pull #3</a> (<span class="emphasis"><em>"Fix/mingw interprocess_exception
                    throw in file_wrapper::priv_open_or_create"</em></span>]).
                  </li>
</ul></div>
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: <a href="https://svn.boost.org/trac/boost/ticket/9221" target="_top">#9221</a>
              showed that <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_MSG_QUEUE_CIRCULAR_INDEX</span></code>
              option of message queue, was completely broken so an ABI break was
              necessary to have a working implementation.
            </li>
<li class="listitem">
              Simplified, refactored and unified (timed_)lock code based on try_lock().
              There were several bugs when handling timeout expirations.
            </li>
<li class="listitem">
              Changed the implementation of condition variables' destructors to allow
              POSIX semantics (the condition variable can be destroyed after all
              waiting threads have been woken up)..
            </li>
<li class="listitem">
              Added <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_SHARED_DIR_PATH</span></code>
              option to define the shared directory used to place shared memory objects
              when implemented as memory mapped files.
            </li>
<li class="listitem">
              Added support for <code class="computeroutput"><span class="identifier">BOOST_USE_WINDOWS_H</span></code>.
              When this macro is defined Interprocess does not declare used Windows
              API function and types, includes all needed windows SDK headers and
              uses types and functions declared by the Windows SDK.
            </li>
<li class="listitem">
              Added <code class="computeroutput"><span class="identifier">get_size</span></code> to
              <code class="computeroutput">::boost:interprocess:windows_shared_memory</code>.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_55_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_55_00" title="Boost 1.55 Release">Boost
        1.55 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7156" target="_top">#7156</a>
                    (<span class="emphasis"><em>"interprocess buffer streams leak memory on construction"</em></span>]).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7164" target="_top">#7164</a>
                    (<span class="emphasis"><em>"Two potential bugs with b::int::vector of b::i::weak_ptr"</em></span>]).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7860" target="_top">#7860</a>
                    (<span class="emphasis"><em>"smart_ptr's yield_k and spinlock utilities can
                    improve spinlock-based sychronization primitives"</em></span>]).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/8277" target="_top">#8277</a>
                    (<span class="emphasis"><em>"docs for named_mutex erroneously refer to interprocess_mutex"</em></span>]).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/8976" target="_top">#8976</a>
                    (<span class="emphasis"><em>"shared_ptr fails to compile if used with a scoped_allocator"</em></span>]).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9008" target="_top">#9008</a>
                    (<span class="emphasis"><em>"conditions variables fast enough only when opening
                    a multiprocess browser"</em></span>]).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9065" target="_top">#9065</a>
                    (<span class="emphasis"><em>"atomic_cas32 inline assembly wrong on ppc32"</em></span>]).
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/9073" target="_top">#9073</a>
                    (<span class="emphasis"><em>"Conflict names 'realloc'"</em></span>]).
                  </li>
</ul></div>
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_54_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_54_00" title="Boost 1.54 Release">Boost
        1.54 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Added support for platform-specific flags to mapped_region (ticket
              #8030)
            </li>
<li class="listitem">
              Fixed bugs:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7484" target="_top">#7484</a>,
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7598" target="_top">#7598</a>,
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7682" target="_top">#7682</a>,
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7923" target="_top">#7923</a>,
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7924" target="_top">#7924</a>,
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7928" target="_top">#7928</a>,
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/7936" target="_top">#7936</a>,
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/8521" target="_top">#8521</a>,
                  </li>
<li class="listitem">
                    <a href="https://svn.boost.org/trac/boost/ticket/8595" target="_top">#8595</a>.
                  </li>
</ul></div>
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: Changed bootstamp function
              in Windows to use EventLog service start time as system bootup time.
              Previously used <code class="computeroutput"><span class="identifier">LastBootupTime</span></code>
              from WMI was unstable with time synchronization and hibernation and
              unusable in practice. If you really need to obtain pre Boost 1.54 behaviour
              define <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_BOOTSTAMP_IS_LASTBOOTUPTIME</span></code>
              from command line or <code class="computeroutput"><span class="identifier">detail</span><span class="special">/</span><span class="identifier">workaround</span><span class="special">.</span><span class="identifier">hpp</span></code>.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_53_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_53_00" title="Boost 1.53 Release">Boost
        1.53 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Fixed GCC -Wshadow warnings.
            </li>
<li class="listitem">
              Experimental multiple allocation interface improved and changed again.
              Still unstable.
            </li>
<li class="listitem">
              Replaced deprecated BOOST_NO_XXXX with newer BOOST_NO_CXX11_XXX macros.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: changed node pool allocators
              internals for improved efficiency.
            </li>
<li class="listitem">
              Fixed bug <a href="https://svn.boost.org/trac/boost/ticket/7795" target="_top">#7795</a>.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_52_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_52_00" title="Boost 1.52 Release">Boost
        1.52 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Added <code class="computeroutput"><span class="identifier">shrink_by</span></code> and
              <code class="computeroutput"><span class="identifier">advise</span></code> functions in
              <code class="computeroutput"><span class="identifier">mapped_region</span></code>.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking:</strong></span> Reimplemented <code class="computeroutput"><span class="identifier">message_queue</span></code> with a circular buffer
              index (the old behavior used an ordered array, leading to excessive
              copies). This should greatly increase performance but breaks ABI. Old
              behaviour/ABI can be used undefining macro <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_MSG_QUEUE_CIRCULAR_INDEX</span></code>
              in <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">interprocess</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">workaround</span><span class="special">.</span><span class="identifier">hpp</span></code>
            </li>
<li class="listitem">
              Improved <code class="computeroutput"><span class="identifier">message_queue</span></code>
              insertion time avoiding priority search for common cases (both array
              and circular buffer configurations).
            </li>
<li class="listitem">
              Implemented <code class="computeroutput"><span class="identifier">interproces_sharable_mutex</span></code>
              and <code class="computeroutput"><span class="identifier">interproces_condition_any</span></code>.
            </li>
<li class="listitem">
              Improved <code class="computeroutput"><span class="identifier">offset_ptr</span></code>
              performance.
            </li>
<li class="listitem">
              Added integer overflow checks.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_51_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_51_00" title="Boost 1.51 Release">Boost
        1.51 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Synchronous and asynchronous flushing for <code class="computeroutput"><span class="identifier">mapped_region</span><span class="special">::</span><span class="identifier">flush</span></code>.
            </li>
<li class="listitem">
              <span class="bold"><strong>Source &amp; ABI breaking</strong></span>: Removed
              <code class="computeroutput"><span class="identifier">get_offset</span></code> method from
              <code class="computeroutput"><span class="identifier">mapped_region</span></code> as it
              has no practical utility and <code class="computeroutput"><span class="identifier">m_offset</span></code>
              member was not for anything else.
            </li>
<li class="listitem">
              <span class="bold"><strong>Source &amp; ABI breaking</strong></span>: Removed
              <code class="computeroutput"><span class="identifier">flush</span></code> from <code class="computeroutput"><span class="identifier">managed_shared_memory</span></code>. as it is unspecified
              according to POSIX: <a href="http://pubs.opengroup.org/onlinepubs/009695399/functions/msync.html" target="_top"><span class="emphasis"><em>"The
              effect of msync() on a shared memory object or a typed memory object
              is unspecified"</em></span> </a>.
            </li>
<li class="listitem">
              Fixed bug <a href="https://svn.boost.org/trac/boost/ticket/7152" target="_top">#7152</a>,
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_50_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_50_00" title="Boost 1.50 Release">Boost
        1.50 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/3750" target="_top">#3750</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6727" target="_top">#6727</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6648" target="_top">#6648</a>,
            </li>
<li class="listitem">
              Shared memory in windows has again kernel persistence: kernel bootstamp
              and WMI has received some fixes and optimizations. This causes incompatibility
              with Boost 1.48 and 1.49 but the user can comment <code class="computeroutput"><span class="preprocessor">#define</span>
              <span class="identifier">BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME</span></code>
              in the windows configuration part to get Boost 1.48 &amp; Boost 1.49
              behaviour.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_49_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_49_00" title="Boost 1.49 Release">Boost
        1.49 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/6531" target="_top">#6531</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6412" target="_top">#6412</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6398" target="_top">#6398</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6340" target="_top">#6340</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6319" target="_top">#6319</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6287" target="_top">#6287</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6265" target="_top">#6265</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6233" target="_top">#6233</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6147" target="_top">#6147</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6134" target="_top">#6134</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6058" target="_top">#6058</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/6054" target="_top">#6054</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5772" target="_top">#5772</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5738" target="_top">#5738</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5622" target="_top">#5622</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5552" target="_top">#5552</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5518" target="_top">#5518</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4655" target="_top">#4655</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4452" target="_top">#4452</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4383" target="_top">#4383</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4297" target="_top">#4297</a>.
            </li>
<li class="listitem">
              Fixed timed functions in mutex implementations to fulfill POSIX requirements:
              <span class="emphasis"><em>Under no circumstance shall the function fail with a timeout
              if the mutex can be locked immediately. The validity of the abs_timeout
              parameter need not be checked if the mutex can be locked immediately.</em></span>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_48_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_48_00" title="Boost 1.48 Release">Boost
        1.48 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/2796" target="_top">#2796</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4031" target="_top">#4031</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4251" target="_top">#4251</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4452" target="_top">#4452</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4895" target="_top">#4895</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5077" target="_top">#5077</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5120" target="_top">#5120</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5123" target="_top">#5123</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5230" target="_top">#5230</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5197" target="_top">#5197</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5287" target="_top">#5287</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5294" target="_top">#5294</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5306" target="_top">#5306</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5308" target="_top">#5308</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5392" target="_top">#5392</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/5409" target="_top">#5409</a>,
            </li>
<li class="listitem">
              Added support to customize offset_ptr and allow creating custom managed
              segments that might be shared between 32 and 64 bit processes.
            </li>
<li class="listitem">
              Shared memory in windows has again filesystem lifetime: kernel bootstamp
              and WMI use to get a reliable timestamp was causing a lot of trouble.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_46_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_46_00" title="Boost 1.46 Release">Boost
        1.46 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
              Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/4557" target="_top">#4557</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4979" target="_top">#4979</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4907" target="_top">#4907</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4895" target="_top">#4895</a>.
            </li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_45_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_45_00" title="Boost 1.45 Release">Boost
        1.45 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/1080" target="_top">#1080</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3284" target="_top">#3284</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3439" target="_top">#3439</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3448" target="_top">#3448</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3582" target="_top">#3582</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3682" target="_top">#3682</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3829" target="_top">#3829</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3846" target="_top">#3846</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3914" target="_top">#3914</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3947" target="_top">#3947</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3950" target="_top">#3950</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3951" target="_top">#3951</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3985" target="_top">#3985</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4010" target="_top">#4010</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4417" target="_top">#4417</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4019" target="_top">#4019</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4039" target="_top">#4039</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4218" target="_top">#4218</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4230" target="_top">#4230</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4250" target="_top">#4250</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4297" target="_top">#4297</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4350" target="_top">#4350</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4352" target="_top">#4352</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4426" target="_top">#4426</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4516" target="_top">#4516</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4524" target="_top">#4524</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4557" target="_top">#4557</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4606" target="_top">#4606</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4685" target="_top">#4685</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/4694" target="_top">#4694</a>.
            </li>
<li class="listitem">
              Added support for standard rvalue reference move semantics (tested
              on GCC 4.5 and VC10).
            </li>
<li class="listitem">
              Permissions can be detailed for interprocess named resources.
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">mapped_region</span><span class="special">::</span><span class="identifier">flush</span></code> initiates disk flushing but
              does not guarantee it's completed when returns, since it is not portable.
            </li>
<li class="listitem">
              FreeBSD and MacOS now use posix semaphores to implement named semaphores
              and mutex.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00" title="Boost 1.41 Release">Boost
        1.41 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Support for POSIX shared memory in Mac OS.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: Generic <code class="computeroutput"><span class="identifier">semaphore</span></code> and <code class="computeroutput"><span class="identifier">named_semaphore</span></code>
              now implemented more efficiently with atomic operations.
            </li>
<li class="listitem">
              More robust file opening in Windows platforms with active Anti-virus
              software.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00" title="Boost 1.40 Release">Boost
        1.40 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Windows shared memory is created in Shared Documents folder so that
              it can be shared between services and processes
            </li>
<li class="listitem">
              Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/2967" target="_top">#2967</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/2973" target="_top">#2973</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/2992" target="_top">#2992</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3138" target="_top">#3138</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3166" target="_top">#3166</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/3205" target="_top">#3205</a>.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00" title="Boost 1.39 Release">Boost
        1.39 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Added experimental <code class="computeroutput"><span class="identifier">stable_vector</span></code>
              container.
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">shared_memory_object</span><span class="special">::</span><span class="identifier">remove</span></code>
              has now POSIX <code class="computeroutput"><span class="identifier">unlink</span></code>
              semantics and <code class="computeroutput"><span class="identifier">file_mapping</span><span class="special">::</span><span class="identifier">remove</span></code>
              was added to obtain POSIX <code class="computeroutput"><span class="identifier">unlink</span></code>
              semantics with mapped files.
            </li>
<li class="listitem">
              Shared memory in windows has now kernel lifetime instead of filesystem
              lifetime: shared memory will disappear when the system reboots.
            </li>
<li class="listitem">
              Updated move semantics.
            </li>
<li class="listitem">
              Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/2722" target="_top">#2722</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/2729" target="_top">#2729</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/2766" target="_top">#2766</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/1390" target="_top">#1390</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/2589" target="_top">#2589</a>,
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00" title="Boost 1.38 Release">Boost
        1.38 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Updated documentation to show rvalue-references funcions instead of
              emulation functions.
            </li>
<li class="listitem">
              More non-copyable classes are now movable.
            </li>
<li class="listitem">
              Move-constructor and assignments now leave moved object in default-constructed
              state instead of just swapping contents.
            </li>
<li class="listitem">
              Several bugfixes ( <a href="https://svn.boost.org/trac/boost/ticket/2391" target="_top">#2391</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/2431" target="_top">#2431</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/1390" target="_top">#1390</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/2570" target="_top">#2570</a>,
              <a href="https://svn.boost.org/trac/boost/ticket/2528" target="_top">#2528</a>.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00" title="Boost 1.37 Release">Boost
        1.37 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Containers can be used now in recursive types.
            </li>
<li class="listitem">
              Added <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_FORCE_GENERIC_EMULATION</span></code>
              macro option to force the use of generic emulation code for process-shared
              synchronization primitives instead of native POSIX functions.
            </li>
<li class="listitem">
              Added placement insertion members to containers
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">pos_inf</span></code> value is now handled portably
              for timed functions.
            </li>
<li class="listitem">
              Update some function parameters from <code class="computeroutput"><span class="identifier">iterator</span></code>
              to <code class="computeroutput"><span class="identifier">const_iterator</span></code> in
              containers to keep up with the draft of the next standard.
            </li>
<li class="listitem">
              Documentation fixes.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00" title="Boost 1.36 Release">Boost
        1.36 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Added anonymous shared memory for UNIX systems.
            </li>
<li class="listitem">
              Fixed erroneous <code class="computeroutput"><span class="keyword">void</span></code> return
              types from <code class="computeroutput"><span class="identifier">flat_map</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code> functions.
            </li>
<li class="listitem">
              Fixed missing move semantics on managed memory classes.
            </li>
<li class="listitem">
              Added copy_on_write and open_read_only options for shared memory and
              mapped file managed classes.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: Added to <code class="computeroutput"><span class="identifier">mapped_region</span></code> the mode used to create
              it.
            </li>
<li class="listitem">
              Corrected instantiation errors in void allocators.
            </li>
<li class="listitem">
              <code class="computeroutput"><span class="identifier">shared_ptr</span></code> is movable
              and supports aliasing.
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00" title="Boost 1.35 Release">Boost
        1.35 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Added auxiliary utilities to ease the definition and construction of
              <code class="computeroutput"><a class="link" href="../boost/interprocess/shared_ptr.html" title="Class template shared_ptr">shared_ptr</a></code>,
              <code class="computeroutput"><a class="link" href="../boost/interprocess/weak_ptr.html" title="Class template weak_ptr">weak_ptr</a></code>
              and <code class="computeroutput"><span class="identifier">unique_ptr</span></code>. Added
              explanations and examples of these smart pointers in the documentation.
            </li>
<li class="listitem">
              Optimized vector:
              <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
                    1) Now works with raw pointers as much as possible when using
                    allocators defining <code class="computeroutput"><span class="identifier">pointer</span></code>
                    as an smart pointer. This increases performance and improves
                    compilation times.
                  </li>
<li class="listitem">
                    2) A bit of metaprogramming to avoid using move_iterator when
                    the type has trivial copy constructor or assignment and improve
                    performance.
                  </li>
<li class="listitem">
                    3) Changed custom algorithms with standard ones to take advantage
                    of optimized standard algorithms.
                  </li>
<li class="listitem">
                    4) Removed unused code.
                  </li>
</ul></div>
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: Containers don't derive
              from allocators, to avoid problems with allocators that might define
              virtual functions with the same names as container member functions.
              That would convert container functions in virtual functions and might
              disallow some of them if the returned type does not lead to a covariant
              return. Allocators are now stored as base classes of internal structs.
            </li>
<li class="listitem">
              Implemented <code class="computeroutput"><a class="link" href="../boost/interprocess/named_mutex.html" title="Class named_mutex">named_mutex</a></code>
              and <code class="computeroutput"><a class="link" href="../boost/interprocess/named_semaphore.html" title="Class named_semaphore">named_semaphore</a></code>
              with POSIX named semaphores in systems supporting that option. <code class="computeroutput"><a class="link" href="../boost/interprocess/named_condition.html" title="Class named_condition">named_condition</a></code>
              has been accordingly changed to support interoperability with <code class="computeroutput"><a class="link" href="../boost/interprocess/named_mutex.html" title="Class named_mutex">named_mutex</a></code>.
            </li>
<li class="listitem">
              Reduced template bloat for node and adaptive allocators extracting
              node implementation to a class that only depends on the memory algorithm,
              instead of the segment manager + node size + node number...
            </li>
<li class="listitem">
              Fixed bug in <code class="computeroutput"><span class="identifier">mapped_region</span></code>
              in UNIX when mapping address was provided but the region was mapped
              in another address.
            </li>
<li class="listitem">
              Added <code class="computeroutput"><span class="identifier">aligned_allocate</span></code>
              and <code class="computeroutput"><span class="identifier">allocate_many</span></code> functions
              to managed memory segments.
            </li>
<li class="listitem">
              Improved documentation about managed memory segments.
            </li>
<li class="listitem">
              <span class="bold"><strong>Boost.Interprocess</strong></span> containers are
              now documented in the Reference section.
            </li>
<li class="listitem">
              Correction of typos and documentation errors.
            </li>
<li class="listitem">
              Added <code class="computeroutput"><span class="identifier">get_instance_name</span></code>,
              <code class="computeroutput"><span class="identifier">get_instance_length</span></code>
              and <code class="computeroutput"><span class="identifier">get_instance_type</span></code>
              functions to managed memory segments.
            </li>
<li class="listitem">
              Corrected suboptimal buffer expansion bug in <code class="computeroutput"><span class="identifier">rbtree_best_fit</span></code>.
            </li>
<li class="listitem">
              Added iteration of named and unique objects in a segment manager.
            </li>
<li class="listitem">
              Fixed leak in <code class="computeroutput">vector</code>.
            </li>
<li class="listitem">
              Added support for Solaris.
            </li>
<li class="listitem">
              Optimized <code class="computeroutput"><a class="link" href="../boost/interprocess/segment_manager.html" title="Class template segment_manager">segment_manager</a></code>
              to avoid code bloat associated with templated instantiations.
            </li>
<li class="listitem">
              Fixed bug for UNIX: No slash ('/') was being added as the first character
              for shared memory names, leading to errors in some UNIX systems.
            </li>
<li class="listitem">
              Fixed bug in VC-8.0: Broken function inlining in core offset_ptr functions.
            </li>
<li class="listitem">
              Code examples changed to use new BoostBook code import features.
            </li>
<li class="listitem">
              Added aligned memory allocation function to memory algorithms.
            </li>
<li class="listitem">
              Fixed bug in <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">clear</span><span class="special">()</span></code> and <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code>, they were declared private.
            </li>
<li class="listitem">
              Fixed bug in <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code>. Thanks to Steve LoBasso.
            </li>
<li class="listitem">
              Fixed bug in <code class="computeroutput"><span class="identifier">atomic_dec32</span><span class="special">()</span></code>. Thanks to Glenn Schrader.
            </li>
<li class="listitem">
              Improved (multi)map/(multi)set constructors taking iterators. Now those
              have linear time if the iterator range is already sorted.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: (multi)map/(multi)set
              now reduce their node size. The color bit is embedded in the parent
              pointer. Now, the size of a node is the size of 3 pointers in most
              systems. This optimization is activated for raw and <code class="computeroutput"><span class="identifier">offset_ptr</span></code>
              pointers.
            </li>
<li class="listitem">
              (multi)map/(multi)set now reuse memory from old nodes in the assignment
              operator.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: Implemented node-containers
              based on intrusive containers. This saves code size, since many instantiations
              share the same algorithms.
            </li>
<li class="listitem">
              Corrected code to be compilable with Visual C++ 8.0.
            </li>
<li class="listitem">
              Added function to zero free memory in memory algorithms and the segment
              manager. This function is useful for security reasons and to improve
              compression ratios for files created with <code class="computeroutput"><span class="identifier">managed_mapped_file</span></code>.
            </li>
<li class="listitem">
              Added support for intrusive index types in managed memory segments.
              Intrusive indexes save extra memory allocations to allocate the index
              since with just one allocation, we allocate room for the value, the
              name and the hook to insert the object in the index.
            </li>
<li class="listitem">
              Created new index type: <span class="bold"><strong>iset_index</strong></span>.
              It's an index based on an intrusive set (rb-tree).
            </li>
<li class="listitem">
              Created new index type: <span class="bold"><strong>iunordered_set_index</strong></span>.
              It's an index based on a pseudo-intrusive unordered set (hash table).
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: The intrusive index
              <span class="bold"><strong>iset_index</strong></span> is now the default index
              type.
            </li>
<li class="listitem">
              Optimized vector to take advantage of <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_trivial_destructor</span></code>.
              This optimization avoids calling destructors of elements that have
              a trivial destructor.
            </li>
<li class="listitem">
              Optimized vector to take advantage of <code class="computeroutput"><span class="identifier">has_trivial_destructor_after_move</span></code>
              trait. This optimization avoids calling destructors of elements that
              have a trivial destructor if the element has been moved (which is the
              case of many movable types). This trick was provided by Howard Hinnant.
            </li>
<li class="listitem">
              Added security check to avoid integer overflow bug in allocators and
              named construction functions.
            </li>
<li class="listitem">
              Added alignment checks to forward and backwards expansion functions.
            </li>
<li class="listitem">
              Fixed bug in atomic functions for PPC.
            </li>
<li class="listitem">
              Fixed race-condition error when creating and opening a managed segment.
            </li>
<li class="listitem">
              Added adaptive pools.
            </li>
<li class="listitem">
              <span class="bold"><strong>Source breaking</strong></span>: Changed node allocators'
              template parameter order to make them easier to use.
            </li>
<li class="listitem">
              Added support for native windows shared memory.
            </li>
<li class="listitem">
              Added more tests.
            </li>
<li class="listitem">
              Corrected the presence of private functions in the reference section.
            </li>
<li class="listitem">
              Added function (<code class="computeroutput"><span class="identifier">deallocate_free_chunks</span><span class="special">()</span></code>) to manually deallocate completely
              free chunks from node allocators.
            </li>
<li class="listitem">
              Implemented N1780 proposal to LWG issue 233: <span class="emphasis"><em>Insertion hints
              in associative containers</em></span> in interprocess <code class="computeroutput">multiset</code>
              and <code class="computeroutput">multimap</code>
              classes.
            </li>
<li class="listitem">
              <span class="bold"><strong>Source breaking</strong></span>: A shared memory object
              is now used including <code class="computeroutput"><span class="identifier">shared_memory_object</span><span class="special">.</span><span class="identifier">hpp</span></code>
              header instead of <code class="computeroutput"><span class="identifier">shared</span>
              <span class="identifier">memory</span><span class="special">.</span><span class="identifier">hpp</span></code>.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: Changed global mutex
              when initializing managed shared memory and memory mapped files. This
              change tries to minimize deadlocks.
            </li>
<li class="listitem">
              <span class="bold"><strong>Source breaking</strong></span>: Changed shared memory,
              memory mapped files and mapped region's open mode to a single <code class="computeroutput"><span class="identifier">mode_t</span></code> type.
            </li>
<li class="listitem">
              Added extra WIN32_LEAN_AND_MEAN before including DateTime headers to
              avoid socket redefinition errors when using Interprocess and Asio in
              windows.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: <code class="computeroutput"><span class="identifier">mapped_region</span></code>
              constructor no longer requires classes derived from memory_mappable,
              but classes must fulfill the MemoryMappable concept.
            </li>
<li class="listitem">
              Added in-place reallocation capabilities to basic_string.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: Reimplemented and optimized
              small string optimization. The narrow string class has zero byte overhead
              with an internal 11 byte buffer in 32 systems!
            </li>
<li class="listitem">
              Added move semantics to containers. Improves performance when using
              containers of containers.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: End nodes of node containers
              (list, slist, map/set) are now embedded in the containers instead of
              allocated using the allocator. This allows no-throw move-constructors
              and improves performance.
            </li>
<li class="listitem">
              <span class="bold"><strong>ABI breaking</strong></span>: <span class="bold"><strong>slist</strong></span>
              and <span class="bold"><strong>list</strong></span> containers now have constant-time
              <span class="emphasis"><em>size()</em></span> function. The size of the container is
              added as a member.
            </li>
</ul></div>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links" title="Books and interesting links">Books
      and interesting links</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_books">Books</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_links">Links</a></span></dt>
</dl></div>
<p>
        Some useful references about the C++ programming language, C++ internals,
        shared memory, allocators and containers used to design <span class="bold"><strong>Boost.Interprocess</strong></span>.
      </p>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links.references_books"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_books" title="Books">Books</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              Great book about multithreading, and POSIX: <span class="bold"><strong><span class="emphasis"><em>"Programming
              with Posix Threads"</em></span></strong></span>, <span class="bold"><strong>David
              R. Butenhof</strong></span>
            </li>
<li class="listitem">
              The UNIX inter-process bible: <span class="bold"><strong><span class="emphasis"><em>"UNIX
              Network Programming, Volume 2: Interprocess Communications"</em></span></strong></span>,
              <span class="bold"><strong>W. Richard Stevens</strong></span>
            </li>
<li class="listitem">
              Current STL allocator issues: <span class="bold"><strong><span class="emphasis"><em>"Effective
              STL"</em></span></strong></span>, <span class="bold"><strong>Scott Meyers</strong></span>
            </li>
<li class="listitem">
              My C++ bible: <span class="bold"><strong><span class="emphasis"><em>"Thinking in C++,
              Volume 1 &amp; 2"</em></span></strong></span>, <span class="bold"><strong>Bruce
              Eckel and Chuck Allison</strong></span>
            </li>
<li class="listitem">
              The book every C++ programmer should read: <span class="bold"><strong><span class="emphasis"><em>"Inside
              the C++ Object Model"</em></span></strong></span>, <span class="bold"><strong>Stanley
              B. Lippman</strong></span>
            </li>
<li class="listitem">
              A must-read: <span class="bold"><strong><span class="emphasis"><em>"ISO/IEC TR 18015:
              Technical Report on C++ Performance"</em></span></strong></span>, <span class="bold"><strong>ISO WG21-SC22 members.</strong></span>
            </li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links.references_links"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_links" title="Links">Links</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              A framework to put the STL in shared memory: <a href="http://allocator.sourceforge.net/" target="_top"><span class="emphasis"><em>"A
              C++ Standard Allocator for the Standard Template Library"</em></span>
              </a>.
            </li>
<li class="listitem">
              Instantiating C++ objects in shared memory: <a href="http://www.cs.ubc.ca/local/reading/proceedings/cascon94/htm/english/abs/hon.htm" target="_top"><span class="emphasis"><em>"Using
              objects in shared memory for C++ application"</em></span> </a>.
            </li>
<li class="listitem">
              A shared memory allocator and relative pointer: <a href="http://home.earthlink.net/~joshwalker1/writing/SharedMemory.html" target="_top"><span class="emphasis"><em>"Taming
              Shared Memory"</em></span> </a>.
            </li>
</ul></div>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements" title="Future improvements...">Future
      improvements...</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.win32_sync">Win32
        synchronization is too basic</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_objectnames">Use
        of wide character names on Boost.Interprocess basic resources</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_security">Security
        attributes</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_ipc">Future
        inter-process communications</a></span></dt>
</dl></div>
<p>
        There are some Interprocess features that I would like to implement and some
        <span class="bold"><strong>Boost.Interprocess</strong></span> code that can be much
        better. Let's see some ideas:
      </p>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.win32_sync"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.win32_sync" title="Win32 synchronization is too basic">Win32
        synchronization is too basic</a>
</h4></div></div></div>
<p>
          Win32 version of shared mutexes and shared conditions are based on "spin
          and wait" atomic instructions. This leads to poor performance and
          does not manage any issues like priority inversions. We would need very
          serious help from threading experts on this. And I'm not sure that this
          can be achieved in user-level software. Posix based implementations use
          PTHREAD_PROCESS_SHARED attribute to place mutexes in shared memory, so
          there are no such problems. I'm not aware of any implementation that simulates
          PTHREAD_PROCESS_SHARED attribute for Win32. We should be able to construct
          these primitives in memory mapped files, so that we can get filesystem
          persistence just like with POSIX primitives.
        </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_objectnames"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_objectnames" title="Use of wide character names on Boost.Interprocess basic resources">Use
        of wide character names on Boost.Interprocess basic resources</a>
</h4></div></div></div>
<p>
          Currently Interprocess only allows <span class="bold"><strong>char</strong></span>
          based names for basic named objects. However, several operating systems
          use <span class="bold"><strong>wchar_t</strong></span> names for resources (mapped
          files, for example). In the future Interprocess should try to present a
          portable narrow/wide char interface. To do this, it would be useful to
          have a boost wstring &lt;-&gt; string conversion utilities to translate
          resource names (escaping needed characters that can conflict with OS names)
          in a portable way. It would be interesting also the use of <span class="bold"><strong>boost::filesystem</strong></span>
          paths to avoid operating system specific issues.
        </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_security"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_security" title="Security attributes">Security
        attributes</a>
</h4></div></div></div>
<p>
          <span class="bold"><strong>Boost.Interprocess</strong></span> does not define security
          attributes for shared memory and synchronization objects. Standard C++
          also ignores security attributes with files so adding security attributes
          would require some serious work.
        </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_ipc"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_ipc" title="Future inter-process communications">Future
        inter-process communications</a>
</h4></div></div></div>
<p>
          <span class="bold"><strong>Boost.Interprocess</strong></span> offers a process-shared
          message queue based on <span class="bold"><strong>Boost.Interprocess</strong></span>
          primitives like mutexes and conditions. I would want to develop more mechanisms,
          like stream-oriented named fifo so that we can use it with a iostream-interface
          wrapper (we can imitate Unix pipes).
        </p>
<p>
          C++ needs more complex mechanisms and it would be nice to have a stream
          and datagram oriented PF_UNIX-like mechanism in C++. And for very fast
          inter-process remote calls Solaris doors is an interesting alternative
          to implement for C++. But the work to implement PF_UNIX-like sockets and
          doors would be huge (and it might be difficult in a user-level library).
          Any network expert volunteer?
        </p>
</div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2015 Ion Gaztanaga<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
</tr></table>
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